问题 解答题
用简便方法计算.
(8+40)×25(125×25)×(8×4)34×10272×125.
答案

(1)(8+40)×25,

=8×25+40×25,

=200+1000,

=1200;

(2)(125×25)×(8×4),

=(125×8)×(25×4),

=1000×100,

=100000;

(3)34×102,

=34×100+34×2,

=3400+68,

=3468;

(4)72×125,

=9×(8×125),

=9×1000,

=9000.

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